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Sequencing batch reactors Used to treat Wine cellar effluent Andrew Hulsman (HWT). Wine industry contribution to our economy. About 8.5% of Western Cape GDP 709 million litres produced in 2006 2 to 8 litres water per litre wine 100 million litres effluent per day

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Sequencing batch reactors

Used to treat

Wine cellar effluent

Andrew Hulsman (HWT)


Wine industry contribution to our economy

About 8.5% of Western Cape GDP

709 million litres produced in 2006

2 to 8 litres water per litre wine

100 million litres effluent per day

A 20 000 ton cellar discharges the COD equivalent of the daily sewage produced from a town of 24 000 people


Vineyards

Wine waste water

Wine Cellar

Various treatment methods

Beneficial reuse


Wine waste water

Low pH

High COD

Variable EC

Pips & skins

Fluctuating flow rate

Various treatment methods


Beneficial

reuse

Various treatment methods

pH neutral

COD < 400


Flow forms

Fine solids removal

Lime dosing

Aerated bioreactor

Reed bed

Screening

Beneficial reuse

Grape pips and skins

Filter aids, lees

pH neutral

Lower cod,nutrients

Buffer, disinfect

Unravel, revitalize

Crop irrigation


Bioreactor design

Sequencing batch reactors

Practical

Economical

Small footprint

Automatic operation (PLC)



Bioreactor design

Sequencing batch reactors


Bioreactor design

Sequencing batch reactors

TWL

LWL

Filling

Aeration

Settling

Draining

Cycle time


Bioreactor design

8000

500

Determined by flow and load


dO

dT

OUR = dO/dT (mgO/l/hr)

Bioreactor design

Determining the oxygen requirement


Bioreactor design

Differing oxygen demand


Bioreactor design

Aerobic digestion


Bioreactor design

Biomass changes through year


Maintenance

During the pressing the winemakers

  • Make good wine

  • Ignore the wastewater treatment plant


Sequencing batch reactors

Practical Yes, except if not used

Economical Yes if < 500 kl/d

Small footprint

Automatic operation (PLC) yes, except during power failure

Work well with

  • Regular maintenance

  • Reed beds





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